| Acronym | Meaning |
| EIP | Eigenvalue-independent Partitioning (in Coupled-cluster Calcns.) |
| SOIC | Small Outline Integrated Circuit |
| PCI-80 | Parametrized Configuration Interaction (with Parameter) 80 |
| ALN | Adaptive Learning Network |
| SCF | Stem Cell Factor |
| ADC(N) | Algebraic Diagrammatic Construction (method In Nth-order Perturbation Theory) |
| APGF | Antisymmetrical Product Of Group Functions (a Wave Function) |
| HAO | Hybrid Atomic Orbital |
| GWPC | Ground Water Protection Council |
| NMA | Nuclear Microanalysis |